Heater



J. H. McNARY May 15, 1934.

HEATER Filed Feb. 15. 1932 j: veiihz m 6 flthz'zmg a Patented May 15, 1934 PATENT OFFICE HEATER John H. McNary, Chelsea, Mass.

Application February 15, 1932, Serial No. 592,865

1 Claim.

This invention relates to heaters such as parlor and railway stoves, furnaces and the like.

One object of my invention is to provide simple means in a heater that will result in heating a room or rooms more quickly than is ordinarily done. Another object is to increase efficiency by using more of the heat units generated by the fire to heat a room. In other words, to get the I same results with less fuel. Still another object l is to make these means so simple in construction and operation that they will be inexpensive to make and install, and will not require any attention during operation.

I am well aware that others have attempted to improve upon heaters by having heated air pass through pipes that are partly within the combustion chamber, in a somewhat similar manner; but they have failed, practically and 4 commercially, because of faulty construction, im- 2:

practical location of said pipes, et cetera.

The foregoing and other objects which will appear as the nature of the invention is better understood, may be accomplished by a construction, combination and arrangement of parts such as is disclosed by the drawing. The nature of the invention is such as to render it susceptible to various changes and modifications, and, therefore, I am not to be limited to the construction disclosed by the drawing; but am entitled to 'all such changes therefrom as fall within the scope of my claim.

In the drawing: Figure 1 is a front elevation, partly broken .away, of my heater with the heating pipes in position.

Figure 2 is an enlarged cross-section of a portion of a heating pipe where it is joined with the combustion chamber portion of my heater.

The heater I have shown in the drawing is the kind commonly used in a small railroad station; although my invention is applicable to parlor stoves, furnaces and other kinds of heaters having suitable combustion chambers.

As illustrated, this heater consists of what I term a fire portion, including a base 12, an ashpit 13 and a fire pot 14. This fire portion may be made of other parts, of course. Around said fire pot 14 is a skirt 15.

Above said fire portion is what I term a combustion chamber portion which consists of a body 16 having a feed door 17 and a top 19. The burning coals are illustrated at 18.

Within said combustion chamber portion are hollow pipes 20 in which air is heated as it passes through. The unusual results achieved by my invention are largely due to the location and direction of these pipes 20. The entering point or outside opening for the cool air is at the lower portion of the combustion chamber portion and adjacent the fire portion. The point of escape or outside opening for the air which has been heated, as it passed through said pipes 20, is in the upper portion of said combustion chamber portion. It is important that said pipes 20 extend diagonally across said combustion chamber so that the fire will have a direct heating effect on the maximum surface of said pipes. To have them otherwise would render said pipes 20 of little advantage and not worth their extra cost.

The angle of said pipes with relation to said overhanging top 16 is such that an extension of their axial lines would pass through the under surface of said top, causing the heated air passing through them to be deflected in its upward passage by said top, thereby keeping the heated air in the lower portion of the room where it is most needed, for a longer period.

The ends of said pipes 20 taper towards the outside, and just before each outside end a rib 21 is formed which comes flush against the inside of said body 16. Outside of and surrounding each pipe opening in said body 16 is a ring 22 having a projecting rim or teat 23 which extends into the opening left between said body 16 and said tapering portion at the outside end of said pipes 20. A little cement may be used to surround said teat 23 to make the joints tight. Said ring 22 is tightly bolted as at 24 to said body 16, making a tight, outside enclosure for the joint between the body 16 and the tapering end of the pipe 20. These elements, numerals 21-24, make the joints between the body and said pipes gas tight, as it is very important tov keep gas out of the room, and yet have air pass through said pipes 20 and be heated by the burning gases in the combustion chamber, thereby constantly pouring warm air into the room, to more quickly heat it than if the usual radiation alone were depended upon.

These air pipes 20 are preferably made of cast iron, although they can be made of other material, and it is possible, though somewhat more expensive, to cast the body 16 and pipes 20 at one time in the type of stove illustrated in the drawing. Locating the pipes 20 wholly within the combustion chamber gives the added advantage of being able, when desirable, to cast the body 16 and pipes 20 in one piece.

chamber portion adjacent said fire portion and another outside opening under said top, said pipes extending across said chamber portion and intersecting each other, the angle of said pipes being such that the extension of their axial lines strikes the under surface of said top.

JOHN H. MCNARY. 

